[AMRadio] RCA BTA1S 80M conversion?

[Ed Sieb]

I have an RCA BTA1S that I am  looking to convert to 80M.    I need to know  which
micas to change in the output tank;  have a box of suitable  micas here to choose
from.    Has anyone done this conversion on  the RCA rigs, specifically the
BTA1R/S  series?   

(Once that is  done,  I know  how to resonate the pi-network with the B+ off using
an SWR analyser and a load resistor across the final.)